Use django-cacheback for asynchronous refreshing. Fixes #7.
Merge pull request #8 from mikebryant/wip-7

Use django-cacheback for asynchronous refreshing. Fixes #7.
Use setuptest, add a simple test, use autoconfig.
Fix Travis tests.
Merge pull request #10 from mikebryant/adding_tests

Use setuptest, add a simple test, use autoconfig.